y^2+4y-45=(y+9)(y-)

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Solution for y^2+4y-45=(y+9)(y-) equation: 



y^2+4y-45=(y+9)(y-)

We move all terms to the left:

y^2+4y-45-((y+9)(y-))=0

We add all the numbers together, and all the variables

y^2+4y-((y+9)(+y))-45=0

We multiply parentheses ..

y^2-((+y^2+9y))+4y-45=0



We calculate terms in parentheses: -((+y^2+9y)), so:

(+y^2+9y)

We get rid of parentheses

y^2+9y

Back to the equation:

-(y^2+9y)



We add all the numbers together, and all the variables

y^2+4y-(y^2+9y)-45=0

We get rid of parentheses

y^2-y^2+4y-9y-45=0

We add all the numbers together, and all the variables

-5y-45=0

We move all terms containing y to the left, all other terms to the right

-5y=45

y=45/-5

y=-9

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